Synthesis of One Dimensional Gold Nanostructures

Synthesis of One Dimensional Gold Nanostructures

Gold nanostructures with shapes of rod, dumbbells, and dog bone have been fabricated by an improved seed-mediated method. It is found that the pH change (the addition of HNO3 or HCl) and the presence of Ag+ ions have a great influence on the growth process and aspect ratios of these Au nanocrystals....

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Veröffentlicht in:Journal of nanomaterials 2010-01, Vol.2010 (2010), p.1-8
Hauptverfasser: Kan, Cai-Xia, Li, Hongchen, Yi, Zhaoguang, Ding, Xiaolong, Cao, Yanli, Zhu, Jie-Jun
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Colleges & universities
Growth models
Materials science
Nanomaterials
Ratios
Seeds
Surfactants
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container_end_page 8
container_issue 2010
container_start_page 1
container_title Journal of nanomaterials
container_volume 2010
creator Kan, Cai-Xia
Li, Hongchen
Yi, Zhaoguang
Ding, Xiaolong
Cao, Yanli
Zhu, Jie-Jun
description Gold nanostructures with shapes of rod, dumbbells, and dog bone have been fabricated by an improved seed-mediated method. It is found that the pH change (the addition of HNO3 or HCl) and the presence of Ag+ ions have a great influence on the growth process and aspect ratios of these Au nanocrystals. UV-Vis-NIR absorption spectra for the Au colloidal show that the transverse plasmon absorption band locates at ~520 nm, while the longitudinal plasmon absorption band shifts in a wide spectra region of 750–1100 nm. The obtained Au nanostructures have been investigated by transmission electron microscopy, high-resolution transmission electron microscopy, and X-ray diffractometer. Based on the characterizations and FDTD simulations, most of the obtained Au nanorods are single crystals, possessing an octagonal cross-section bounded by {110} and {100} faces. One model for the anisotropic growth has been proposed. It is found that slow kinetics favor the formation of single-crystalline Au nanorods.
doi_str_mv 10.1155/2010/962718
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subjects Colleges & universities
Growth models
Materials science
Nanomaterials
Ratios
Seeds
Surfactants
title Synthesis of One Dimensional Gold Nanostructures
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